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2F = 8 cm --> F = 4 cm
S' = 12 cm
ditanya :
M?
Jawab :
1/f = 1/s + 1/s'
1/4 = 1/s + 1/12
1/s= 1/4-1/12
1/s = 3/12-1/12
1/s = 2/12
s = 6 cm
M = s/s'
M = 6/12
M = 1/2
cmiiw ya :)